[distcc] When distcc is enabled force cmake to use localhost for configure testing.

It seems that distcc --randomize is causing cmake to invoke configuration
commands on remote machines. This is slow. Instead, just use the localhost host
when running cmake.

The rest of the build is distributed as normal.

Author: gottesmm

utils/build-script-impl

@@ -1884,7 +1884,10 @@ for deployment_target in "${HOST_TARGET}" "${CROSS_COMPILE_TOOLS_DEPLOYMENT_TARG
                     ( ! -z "${generator_output_path}" && ! -f "${generator_output_path}" ) ]] ; then
             set -x
             mkdir -p "${build_dir}"
-            (cd "${build_dir}" && "${CMAKE}" "${cmake_options[@]}" "${EXTRA_CMAKE_OPTIONS[@]}" "${source_dir}")
+            if [[ -n "${DISTCC}" ]]; then
+                EXTRA_DISTCC_OPTIONS="DISTCC_HOSTS=localhost,lzo,cpp"
+            fi
+            (cd "${build_dir}" && env "${EXTRA_DISTCC_OPTIONS}" "${CMAKE}" "${cmake_options[@]}" "${EXTRA_CMAKE_OPTIONS[@]}" "${source_dir}")
             { set +x; } 2>/dev/null
         fi